We are writing to inform you that the concerned maintenance activity has been postponed to the below mentioned time frame.
Previous Start Time: 2026-07-21 04:00 UTC Previous End Time: 2026-07-21 06:00 UTC
New Start Time: 2026-07-30 04:00 UTC New End Time:2026-07-30 06:00 UTC
Impact: During the maintenance window, customers may experience a loss of MMS delivery receipts. In addition, MMS MT traffic destined for AT&T devices may be delayed or fail.
We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled, we will advise you accordingly.
Please contact support@sinch.com should you require further information or assistance.
Posted Jul 14, 2026 - 15:21 UTC
Scheduled
Dear Client,
To improve the performance and reliability of our MMS platform, Sinch has scheduled maintenance affecting AT&T MMS connectivity. Please find the maintenance details below.
Maintenance Start time: 2026-07-21 04:00 UTC Maintenance End time: 2026-07-21 06:00 UTC
Impact: During the maintenance window, customers may experience a loss of MMS delivery receipts. In addition, MMS MT traffic destined for AT&T devices may be delayed or fail.
We appreciate your patience and apologize for any inconvenience experienced during this maintenance period. If for any reason the maintenance is extended or cancelled, we will advise you accordingly.
Please contact support@sinch.com should you require further information or assistance.
Posted Jul 02, 2026 - 18:32 UTC
This scheduled maintenance affects: Messaging APIs (MMS - US).